Initial commit

magazine-cutout/src/lib.rs

@@ -0,0 +1,25 @@
+// This stub file contains items that aren't used yet; feel free to remove this module attribute
+// to enable stricter warnings.
+#![allow(unused)]
+
+use std::collections::HashMap;
+
+pub fn can_construct_note(magazine: &[&str], note: &[&str]) -> bool {
+    let magazine_map = magazine
+        .iter()
+        .fold(HashMap::new(), |mut words, str| {
+            *words.entry(str).or_insert(0) += 1;
+            words
+        });
+
+    let note_map = note
+        .iter()
+        .fold(HashMap::new(), |mut words, str| {
+            *words.entry(str).or_insert(0) += 1;
+            words
+        });
+
+    note_map
+        .iter()
+        .all(&|(word, count)| magazine_map.get(word).unwrap_or(&0) >= count)
+}